fix(grpc): pass by modelpath

Instead of trying to derive it from the model file. In backends that
specify HF url this results in a fragile logic.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

backend/backend.proto

@@ -233,6 +233,8 @@ message ModelOptions {
 
   bool FlashAttention = 56;
   bool NoKVOffload = 57;
+
+  string ModelPath = 59;
 }
 
 message Result {

backend/python/diffusers/backend.py

@@ -301,13 +301,11 @@ def LoadModel(self, request, context):
                 self.pipe.controlnet = self.controlnet
             else:
                 self.controlnet = None
-            # Assume directory from request.ModelFile.
-            # Only if request.LoraAdapter it's not an absolute path
-            if request.LoraAdapter and request.ModelFile != "" and not os.path.isabs(request.LoraAdapter) and request.LoraAdapter:
-                # get base path of modelFile
-                modelFileBase = os.path.dirname(request.ModelFile)
+
+            if request.LoraAdapter and not os.path.isabs(request.LoraAdapter):
                 # modify LoraAdapter to be relative to modelFileBase
-                request.LoraAdapter = os.path.join(modelFileBase, request.LoraAdapter)
+                request.LoraAdapter = os.path.join(request.ModelPath, request.LoraAdapter)
+
             device = "cpu" if not request.CUDA else "cuda"
             self.device = device
             if request.LoraAdapter:

pkg/model/initializers.go

@@ -425,6 +425,7 @@ func (ml *ModelLoader) grpcModel(backend string, autodetect bool, o *Options) fu
 		options := *o.gRPCOptions
 		options.Model = modelName
 		options.ModelFile = modelFile
+		options.ModelPath = ml.ModelPath
 
 		log.Debug().Msgf("GRPC: Loading model with options: %+v", options)